I need to gain weight and muscle mass...best methods please

[boyptc]

The best way is working out with personal trainers, proper eating, and protein. And in some time you'll see the first results

This is the best advice.

Get a personal trainer so that he can also help you with your diet. They have a specific diet for you to follow as you workout but if that's not enough, get a dietitian.

With the consultation that I have before, diet and workout must be balanced.

They'll also prescribe some meds for you to take.

[semobo]

Gaining weight and building muscle are two different things, to gain weight we need to get high calorie diet and for muscle building we should add more proteins into that diet and also working out is important to get into shape or it will turns out into obese.

[daneal stev]

In order to gain weight, you must continue to exercise in addition to the fact that you must stop taking medications and vitamins, and you must start to rely on natural foods. Focus on eating eggs and meat, especially chicken breast. It would be good to drink milk on a daily basis, and I advise you to eat dinner before bed

[optimisticcm]

Add nuts, organic butter and organic oil to your diet.
Also try to add meat to your daily diet and you will see result in few months.

[Kamilaz]

Go easy on the cardio, focus on weight lifting.
Eat a lot (aka bulking).